Watched it last night. It's pretty good. The movie is definitely more focused on the two characters making their way through the infected zone back to America rather than on the conflict between the aliens and humans. The environment is awesome. Apparently a lot of the destruction and anomolies throughout the movie are results of storms and other things. Also, the budget for the film is only supposed to have been around $15,000. Shot with a normal video camera and all of the extras that are in the movie are mexican residents that lived in the area that they were filming, instead of using actual paid actors.
The movie itself is I'd say a 3.5/5. Considering the very limited budget and the way they went about filming it I'd give it a 4.5 and this movie should be an inspiration to any aspiring movie directors.